Bun

Bun is an all-in-one JavaScript runtime, bundler, transpiler, and package manager designed for speed. It is 3x faster than Node.js in benchmarks and dramatically speeds up install times with its built-in package manager. Bun is now used in production by companies who have migrated their Node services for performance.

Bun is based in San Francisco, USA.

Bun was founded in 2022.

Bun has raised $7M in their Series A round as of Jul 2025.

Bun was founded by Jarred Sumner.

Bun is backed by Y Combinator, Kleiner Perkins.

Software engineers + DevOps teams shipping production systems — from indie hackers to enterprise platform teams at scale.

Bun is an all-in-one JavaScript runtime, bundler, transpiler, and package manager designed for speed. It is 3x faster than Node.js in benchmarks and dramatically speeds up install times with its built-in package manager… The category has historically been served by tools that miss the modern workflow this product is built around.

Bun differentiates on incredibly fast javascript runtime and toolkit. Backed by Y Combinator + Kleiner Perkins, $7M raised — the company has resources + validation to compound this thesis. Founded by Jarred Sumner.

Series-A scaling stage — building outbound sales motion, hiring first AEs, layering on customer success. Mix of PLG (where the product allows) + direct sales for higher-ACV deals.